"during some weeks" is correct and usable in written English.
For example, you could say: "During some weeks in the summer, the temperature rises to more than 40 degrees Celsius."
"As the President gets better, I get better too," he told Blaine during some weeks of false hope.
Above the notice reminding everyone to pay, the scientists put a picture of eyes during some weeks and a picture of flowers in other weeks.
But the amounts had fallen recently and the E.C.B. made no purchases at all during some weeks of October and November.
MasterCard's SpendingPulse data service, which measures both cash and credit card sales of gasoline, had shown volume declines as sharp as 9percentt during some weeks in the fall.
The tallies provided by the immigration agency are probably low because many of the detention centers failed to report segregation statistics during some weeks of the review, and some did not include mental health cases in their tallies.
"Merchant" received mostly rave reviews this month, and its star power and positive word-of-mouth have helped the box office grosses to exceed $1 million during some weeks, a very high amount for a play.
The vividness of the problem is something I've seen up-close during some-forty weeks of reporting in emerging markets.
Vaskovic said there was "disarray" during the strike – some weeks he was supposed to have 13 lectures and received only three.
This was during their first meeting, some weeks ago.
The spirit off the field, during some five weeks together, was strong.
Some weeks ago, during a busy afternoon A&E shift, I ran the resuscitation bay.
